flannel

flannel, large group of napped plain-weave or twill-weave fabrics made of cotton, wool, or man-made fibers. Flannel fabrics vary in closeness or firmness of weave and in degree of napping. A French flannel, for example, is a very fine twill-weave fabric, slightly napped on the right side only, whereas a suede flannel is napped on both sides and sheared, with the fibers pressed into the fabric.